Running a business from home: when permission is needed

Most home businesses need no planning permission, because the council's only question is whether the use of the house has materially changed. A consultant answering emails in a spare bedroom has not changed the use of anything. A car repair business with three vehicles on the drive and a compressor running at 7am has. The line between the two is drawn by the character of the activity rather than by the fact that money is being earned, and nobody at the council cares that you have registered for VAT.

The statutory hook is section 55 of the Town and Country Planning Act 1990, which treats a material change in the use of a building or land as development. Where the business activity stays incidental to living there, no change of use has occurred and there is nothing to apply for.

The question the council actually asks

Officers look at whether the dwelling is still, in substance, a dwelling used by a household, with a business as one of the things that household does. They test that against a familiar set of indicators.

• How many people come to the property, and whether they are customers, clients or employees.
• Deliveries and collections, especially by vehicles larger than a car.
• Parking demand on the street and on the plot.
• Noise, fumes, dust or vibration audible or detectable beyond the boundary.
• Hours during which activity happens, particularly early mornings and evenings.
• Storage of materials or stock, inside or outside.
• Whether part of the house has been given over exclusively to the business and adapted for it.

No single indicator decides it. Two or three together usually do. A dog grooming business seeing six clients a day in a terraced street will be a change of use on visitor numbers and parking alone, while the same business seeing two clients a week on a rural plot with a long drive almost certainly will not.

What stays incidental

Activity that leaves the house looking and sounding like a house is the safe territory. Desk based work. Dressmaking. Writing, bookkeeping, tutoring one pupil at a time. Making things by hand without machinery that neighbours can hear. Selling online where stock fits in a cupboard and the courier calls once a day.

Childminding sits on the edge and depends on numbers. Registered childminding for a handful of children is generally treated as incidental, while a setting that reads as a nursery in a residential street is a change of use. The dividing line is usually drawn by the comings and goings at drop off and pick up rather than by the care itself.

Letting a room to a lodger does not change the use of a C3 dwellinghouse. Letting two rooms to unrelated people starts to engage the C4 house in multiple occupation question, which is a different analysis and may be caught by an Article 4 direction in the area.

Visitors, deliveries and parking

This is the issue that produces complaints and therefore the issue that produces enforcement. A street that loses two spaces every weekday to clients will generate neighbour contact with the council whatever the planning merits.

Where visitor numbers are the crux, a short record helps more than an argument. Count the visits over a representative fortnight, note arrival times and whether vehicles park on the plot or the street, and put the numbers in front of the officer. Where on street stress is the concern, the methodology used for a Parking Survey gives a defensible way of showing available capacity, although a full survey is rarely proportionate for a home business.

Commercial vehicles are a separate trigger. A single van used by the occupier is normally unremarkable. A tipper, a skip lorry or a plant trailer parked on a residential drive will attract attention and, in some areas, a condition on the original estate permission already prohibits it.

Signage, storage and equipment

A nameplate is usually fine. Illuminated signage, a fascia or anything that advertises to passing trade is likely to need advertisement consent under the separate control regime and will also point towards a change of use having occurred.

Storage is the quiet problem. Stock stacked in a garage is invisible. Pallets in the front garden, a shipping container in the rear, or a trade counter operating from the garage door are all visible, and each converts a tolerated arrangement into an enforcement case.

Where the activity needs a dedicated building, the outbuilding right under Class E will not help. That right requires use incidental to the enjoyment of the dwellinghouse, and a workshop run as a business is not incidental. The structure may be lawful while the use is not, which is a distinction set out in our note on garden offices and the separate planning unit problem.

Noise, fumes and hours

Environmental health is often the route by which a home business comes to the council's attention, and the statutory nuisance powers under the Environmental Protection Act 1990 operate independently of planning. A business can be lawful in planning terms and still be served an abatement notice.

Where machinery is involved, the honest test is whether it can be heard at the boundary of the nearest neighbour. Extraction and odour belong in the same bracket: a commercial kitchen in a domestic house will almost always need permission because of the extraction, before anyone considers the visitor numbers. Where a proposal reaches that point, the evidence usually takes the form of a Noise Impact Assessment measured against the relevant standard.

An illustrative example

This example is illustrative. A joiner works from a double garage attached to a 1970s detached house on an estate road. He has a bench saw and a planer, works 8am to 5pm, and has no customers to the house. Timber is delivered by a rigid lorry roughly fortnightly and finished work leaves in his van.

The visitor analysis is favourable. The noise analysis is not, because a planer in a garage with an open door is audible well beyond the boundary, and the fortnightly lorry blocks the estate road.

His practical options are to apply for permission for a mixed use with conditions on hours and on keeping doors closed, to acoustically treat the garage and keep the activity below the boundary threshold, or to take the machinery to a unit and keep only assembly at home. Applying is often the better route, because a permission with conditions is defensible and an unauthorised use is not.

Where a certificate helps

Two situations call for a lawful development certificate. The first is where you want certainty before investing: an application under section 192 of the 1990 Act for a proposed use produces a binding answer on the facts put forward.

The second is where the use has run for a long time already. A certificate of lawful existing use under section 191 relies on the relevant immunity period having elapsed, with time limits altered by the Levelling-up and Regeneration Act 2023, so check the current position before relying on a period you remember. Either way, a certificate is the only formal way to confirm that a use is lawful.

Leases and restrictive covenants are a separate matter entirely. Many estate transfers prohibit trade or business from the property, and that prohibition is enforceable by whoever holds the benefit regardless of what the council says.

Where an application is the right answer, a short Planning Statement setting out the visitor numbers, hours, deliveries and the conditions you are willing to accept does most of the work, and offering the conditions yourself tends to shorten the determination.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.